What was found in ZIP 91767
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 29000 µg/L 290% of the EPA limit, in the worst sample — 10000 µg/L | 1/2 | SYR4 |
| Nitrate-Nitrite | 22000 µg/L 220% of the EPA limit, in the worst sample — 10000 µg/L | 1/2 | SYR4 |
| Fluoride | 600 µg/L 15% of the EPA limit 4000 µg/L | 1/2 | SYR4 |
| Chromium | 180 µg/L 180% of the EPA limit, in the worst sample — 100 µg/L | 1/2 | SYR4 |
| Trichloroethylene | 130 µg/L 2600% of the EPA limit, in the worst sample — 5 µg/L | 1/2 | SYR4 |
| Barium | 100 µg/L 5% of the EPA limit 2000 µg/L | 1/2 | SYR4 |
| TTHM | 68 µg/L 85% of the EPA limit 80 µg/L | 2/2 | SYR4 |
| 1,1-Dichloroethylene | 61 µg/L 871% of the EPA limit, in the worst sample — 7 µg/L | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 38 µg/L 63% of the EPA limit 60 µg/L | 2/2 | SYR4 |
| Tetrachloroethylene | 34 µg/L 680% of the EPA limit, in the worst sample — 5 µg/L | 1/2 | SYR4 |
| Dibromochloromethane | 29 µg/L No EPA limit set | 2/2 | SYR4 |
| Chloroform | 27 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromodichloromethane | 21 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromoform | 17 µg/L No EPA limit set | 2/2 | SYR4 |
| Dichloroacetic Acid | 16 µg/L No EPA limit set | 2/2 | SYR4 |
| Trichloroacetic Acid | 12 µg/L No EPA limit set | 2/2 | SYR4 |
| Arsenic | 11 µg/L 110% of the EPA limit, in the worst sample — 10 µg/L | 1/2 | SYR4 |
| Lithium | 9.3 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Dibromoacetic Acid | 8.3 µg/L No EPA limit set | 2/2 | SYR4 |
| Selenium | 7.2 µg/L 14% of the EPA limit 50 µg/L | 1/2 | SYR4 |
| Combined Uranium | 7.003 µg/L 23% of the EPA limit 30 µg/L | 1/2 | SYR4 |
| Monobromoacetic Acid | 6.2 µg/L No EPA limit set | 2/2 | SYR4 |
| Monochloroacetic Acid | 5.7 µg/L No EPA limit set | 1/2 | SYR4 |
| Thallium, Total | 1.2 µg/L 60% of the EPA limit 2 µg/L | 1/2 | SYR4 |
| 1,2-DIBROMO-3-CHLOROPROPANE | 0.1100 µg/L 55% of the EPA limit 0.2000 µg/L | 1/2 | SYR4 |
| PFOS | 0.0180 µg/L No EPA limit set | 2/2 | UCMR-5 |
| PFOA | 0.0129 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Pfhxa | 0.0084 µg/L No EPA limit set | 2/2 | UCMR-5 |
| PFHXS | 0.0079 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Pfpea | 0.0064 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Lead | 0.0056 mg/L 37% of the EPA limit 0.0150 mg/L | 2/2 | LCR |
| PFBS | 0.0051 µg/L No EPA limit set | 2/2 | UCMR-5 |
| Pfhpa | 0.0046 µg/L No EPA limit set | 1/2 | UCMR-5 |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 91767
| Supplier | State | Population served |
|---|---|---|
| POMONA - CITY, WATER DEPT. | CA | 151,713 |
| GSWC - CLAREMONT | CA | 39,730 |
Frequently asked questions about ZIP 91767 tap water
Is the tap water in ZIP 91767 safe to drink?
EPA testing detected 33 contaminants across the water suppliers serving ZIP 91767. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 91767?
2 public water suppliers report EPA drinking-water monitoring for ZIP 91767. Each is listed above with its population served.
What contaminants are in ZIP 91767's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Chromium, Trichloroethylene, and others across this ZIP's suppliers. The full list with levels and sources is above.